Taking the concepts of the last 2 days, I will take a step back.  Take all existing smartphone technology and create simply an app that does 5 things. 

1. It uses wifi and/or bluetooth to set up an exacting timing sych between 2 or more “connected” phones. 
2. It uses the accelerometer of each device to get a near exact reference to where each phone’s camera is “looking.”
3. It coordinates the 2 or more phones to take a collective group picture.
4. As a combined session, each smartphone uploads the images to a centralized server, where sofware creates a realistic 3D image.
5. The centralized server then shares this 3D image with all participating phones.

(A techy note – how I envision step 2 happening is once all phones are synched up, the software would direct the participants to place all 2+ phones on top of each other, oriented the same way, with particular phones in a particular place in the “stack.”  This way, when phones were then picked up and moved into position for the “shot,” the accelerometers all be used to provide their various approximate location data.  This is suprisingly accurate in todays phones – and the central server’s software would be able to fine tune the image from this initial data sampling)

This is beyond a cool idea.  A pretty limitless bit of technology.

I’m in for $1000 to making this a reality.